Roofing attachment



A. c. FISCHER 1,723,927

ROOFING ATTACHMENT Filed Aug. 21, 1926 Patented Aug, 6, 1929.

*- UNITED STATES 1,723,927 PATENT- OFFICE.

ALBERT C. FISCHER, OF CHICAGO, ILLINOIS, .ASSIGNOR TO THE PHILIP CAREYMANU- FAC'IURING COMPANY, A CORPORATION OF OHIO.

ROOFING ATTACHMENT.

Original application filed June 3, 1920, Serial No. 386.260, now PatentNo. 1,600,667, dated September 1,

1926. Divided and this application filed August 21, 1926. Serial No.130,689.

will be cheaply produced,-can be applied with minimum labor and will bevery efficient in itsanchorage to the building structure to which it isapplied and in the weatherproofing of lapping areas, such as, jointsbetween the several sheets of the material. x

The invention proceeds upon the principle of providing roofing materialwith means whereby lapping areas of twoor more pieces of the materialare equippedwith' comple mentary 1nterlockmg and adhering oining meansso as to account for a positive water proof joint along lapping areas ofthe material when applied upon a roof.

The salient features of the invention are well illustrated in theaccompanying drawing, in which Figure 1 is a perspective view of a rollof sheet roofing partially unrolled, and showing the invention asapplied thereto; I

Figure 2 is a perspective view of two joined sheets of roofingmaterialinterlocked or joined by the invention, and with a portionof thesheet broken away to show the cooperative relationship of the parts ofthe complementary interlock.

Referring now to the drawing in detail: My invention, although shown andhereinafter, described in combination with sheet roofing of the typeusually'supplied in rolls,

is by no means necessarily limited to this particular form of roofingand should be considered as applicable to various forms of roofingmembers, such as, shingles and the like. However, considering theillustrative embodiment shown in the drawing 1 represents an ordinaryroll offlexible roofing which maybe fabricated without departing fromthe conventional methods now in vogue.

It is my suggestion to apply the invention gaged in applying the roofingmaterial, since it will overcome the necessity of the roofer taking lapcement on the job with him, the well known difficulties of applying thecement, and it will also overcome the moss sity of supplying a can oflap cement with each roll of roofing, which will be a saving to themanufacturer owing to the fact that these cans often become damaged intransit, experiencing a loss of the contents, damage to the materialwith which the cans are packed, and other well known difiiculties.

Generally speaking, my invention consists in the application of aserrated ridge 2 of felt, or some other material suitable for thepurpose, along the lapping area on one side of the sheet which is to beoverlapped by an adjoining sheet, and a like serrated ridge 3 along thelapping area on the reverse side of the sheet which overlaps anadjoining sheet.

The ridges will be'applied for the most part along the longitudinaledges of the sheet, rolled with the sheet and adhered thereto bysupplying a coating of adhesive suitable for the purpose. The adhesivecoating will not be applied with any attempt to conform to the outlineof the serrations, as it is my purpose to leave the spaces -l betweenthe serrations filled with the adhesive, so that when the ridges areinterlocked and the material in one ridge fits into the cut-out spacesin the other ridge the adhesive will function to maintain theinterlocking engagement.

Usually sheet roofing of this type is supplied inthicknesses of about ofan inch, at least this dimension will do for illustrating my invention,and the felt ridges which are applied to the sheet will likewise haveping joints in the roof-from becoming displaced due to warping, as aresult of expansion and contraction or from Wind, nails may be driventhrough the joints if necessary;

The interlockingeifect of thecooperation between a ridge 3 on theunderside of the sheet I and ridge 2 on the top side of an adjoiningsheet is fairly well illustrated in Figure 2, and it will be noticedthat the thickness of the ridges will offer a fairly good abutment forthe interlock, so that there is no danger of the seaming areas pullingapart, ,at least in the direction of the plane of the sheets. A.tendency to do this may result from expansion and contraction or windpressure.

There is another feature about this serrated form of ridges which shouldnot be overlooked in comparing the construction withprior attempts alongthis line. For instance, the abutment is-in the direction of the planeof the sheets, and the serrated abutting faces provide re-entrantabutting faces and consequently greatly increase the meeting surface andthe weather-proofing quality of the joint formed by the engagement ofsuch abutting faces.

Should any difficulty arise as to the practicability of leaving theadhesive exposed in the spaces 4 between the serrations, I need onlysuggest the use of an adhesive of more or less lasting adhesivequalities, which will not dry out over a considerable length of time, sothat if the sheet is unrolled even after a yea-rs lapse of timebetweenits fabrication and the time'it'is to be applied, the adhesive in thespaces formed will be found to be still capable of functioning. Thereare a number of formulas known to the trade for adhesive suitable forthis purpose, among which may be mentioned trwtanglefoot See alsoformulas for asphalt fluxes, residual oils and road oils in thepublication Asphalts and Allied Substances by Herbert Abraham, 1918edition. The thickness of the ridges will protect. the adhesive betweenthe spaces in the serrations when the sheet is rolled, due to thefaetthat I will not completely fill the spacesv and the adhesive willthen be at a lower elevation thanthe thickness of the ridges.

WVhile I have more or less elaborated on the adhesive to be used I havenot done this with any idea of making the same an important adjunct tothe invention, since, if desirable, the spacesbetween the serrations maybe left unfilled and the adhesive applied just prior to the'applicationof the sheets to the roof. I would prefer the other method explained,that is to say, have the material carry the adhesive from the beginning,as it will overcome the disznlvaniage of carrying the adhesive onto theroot as an accessory in applying the sheets.

- I might also explain that any one of many latent adhesives may be usedas a filler bctween the serrations, and the same revivilied at the timethe sheets are applied to the roof by some solvent, such as, kerosene.

I claim:

1. Sheet roofing having a. serrated ridge along the lapping area on oneside of the sheet which is to be overlapped by an adjoining sheet, and aserrated ridge along the lapping which overlaps an adjoining sheet.

2. Sheetrooting having a. serrated ridge along the lapping area on oneside of 'lhe sheet which is to be overlapped by an adjoining sheet, anda serrated ridge along the lapping area on the reverse side of the sheetwhich overlaps an adjoining sheet, a lapping area of the strips beingprovided with an adhesive.

3. Roofing material having a serrated ridge on one side and along a margn thereof which is to be overlapped by adjoining material when thematerial is laid upon a roof, and a serrated ridge on the reverse sideof the material and along a margin thereof which will overlap adjoiningmaterial when the material is laid upon a roof, the serrated ridge onone piece of material interlocking with the serrated ridges on twoadjoining pieces of material, with the thickness of the ridges inabutting, confronting relation.

4. Sheet roofing having a serrated ridge along the lapping area on oneside of the sheet, which is to be overlapped by the adjoining sheet, aserrated ridge along the lapping area on the reverse side of the sheetwhich overlaps the adjoining sheet, and an adhesive on the serratedabutting faces.

ALBERT e. FISCHER.

area on the reverse side of the sheet I 1'

